The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Wexler, Adam D.; Sáenz, Mónica López; Schreer, Oliver; Woisetschläger, Jakob; Fuchs, Elmar

doi:10.3791/51819-v

Cited by 1 publication

(2 citation statements)

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“…The scattered light can be attributed to the electric polarizability of the water molecule. For Raman spectroscopy the floating water bridge was produced using a standard set-up according to Wexler et al [24] and as illustrated in figure 1. Two glass beakers (6 cm diameter, 3 cm height, 100 ml, Pyrex) were filled with 66 ml of deionized water (18.2 MΩ, Millipore Corp., MA, USA), and two Pt electrodes (1 cm 2 ) were submerged into these beakers connected to the high-voltage output of a DC power supply (HCP 30000-300, FuG Elektronik GmbH, Schechen, Germany).…”

Section: Raman Spectroscopy Set-upmentioning

confidence: 99%

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Raman spectroscopy and shadowgraph visualization of excess protons in high-voltage electrolysis of pure water

Fuchs¹,

Yntema²,

Woisetschläger³

2019

J. Phys. D: Appl. Phys.

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In a horizontal electrohydrodynamic bridge experiment, protons are created at the anode via high-voltage electrolysis. The hydrated protons can be observed both optically using shadowgraphy and Raman spectroscopy. If the system is taken out of its electrochemical equilibrium by a sudden disruption of the bridge, excess protons remain in the anolyte. These protons are observed via an enhancement of solvated protons and their accumulation at the liquid surface, causing a residual electric field of several kV/m and a reduction of surface tension by a few mN/m as they accumulate at and escape through the surface.

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Section: Raman Spectroscopy Set-upmentioning

confidence: 99%

“…If the bridge is broken abruptly, the system is taken out of its electrochemical equilibrium, and excess protons and water-protons remain in the beakers [23]. Details about how to safely build and run an EHD bridge set-up are provided by Wexler et al [24].…”

Section: Introductionmentioning

confidence: 99%